Gross profit

Gross Income - Gross income refers to the total annual rental income generated by a property (the annual net rent excluding utilities for all rentable units) and is a key metric in the income approach to real estate valuation.

What exactly is gross income, and how is it calculated?

Gross income plays a key role in real estate valuation under the Real Estate Valuation Ordinance (ImmoWertV). It encompasses all income that can be sustainably generated through the proper management and permissible use of a property. For residential real estate, this corresponds to the sum of all net cold rents for all residential and commercial units of a property on an annual basis.

The distinction between the rent actually paid (actual rent) and the rent that can be sustainably achieved on the market (market rent) is crucial. For the income approach, the rent that can be sustainably achieved is generally used, not the current contractual rent. If the actual rent is significantly below the market rent-for example, because long-term leases are in place-the gross yield can be calculated based on the market rent to realistically reflect the property’s actual value.

The gross yield takes into account only the net base rent. Pass-through operating costs such as heating, water, or garbage collection are not included, as they are passed on to the tenants and do not represent income for the owner. One-time special payments or tenant subsidies are also excluded.

From Gross Yield to Net Yield

In the next step, operating costs are deducted from the gross income-these include administrative costs, maintenance costs, the risk of rent loss, and, if applicable, non-pass-through operating costs. The result is the net income of the property, which serves as the basis for the actual income approach calculation. The formula is: gross income minus operating costs equals net income.

Management costs are calculated as a percentage of the gross income or the building’s market value. Typical values are: administrative costs 3-5% of gross income, maintenance costs 0.5-1.5% of the building’s market value, and risk of rent loss 2-4% of gross income. Taken together, operating costs typically reduce the gross income by 15-25% before the net income is used for the actual income approach calculation.

The Role of Gross Income in the Income Capitalization Approach

The income capitalization approach is primarily used for rented residential and commercial properties where the focus is on the yield. Gross income forms the starting point for the entire calculation. A correctly determined gross income is therefore crucial for a reliable valuation result.

If the gross yield is set too high-for example, by uncritically adopting inflated asking rents-the resulting income value will be too high, creating a distorted picture. Conversely, a gross yield set too low leads to an undervaluation of the property. Experts therefore rely on local rent indices, comparable rents, and market data from appraisal committees to ensure a realistic assessment.

Gross Income for Mixed-Use Properties

For mixed-use properties (residential and commercial), gross income is calculated separately by type of use. Commercial units often generate higher rents per square meter but are subject to a higher risk of rent loss, as tenant retention is lower than with residential tenants. Maintenance costs also vary: commercial spaces are subject to greater wear and tear, which justifies higher maintenance estimates.

When valuing a mixed-use property, the appraiser assesses whether the commercial units are structurally compatible with the property (e.g., a retail space on the ground floor of a residential building) or whether the mix of uses detracts from the value of the residential units (e.g., a noisy commercial operation in a quiet residential neighborhood). These qualitative factors are factored into the estimates for rental loss risk and the capitalization rate.

Gross Income and Rent Adjustments as Leverage for Value Appreciation

Since gross income is directly linked to the income value, every sustainable rent increase leads to a corresponding increase in value. A rent increase of €100 per month (€1,200 annually) increases gross income by €1,200. With a capitalization rate of 4%, this represents an increase in capital value of €30,000 (1,200 / 0.04). For landlords, the regular review and adjustment of rents is therefore not only a means of ongoing income optimization but also a direct lever for increasing the value of the entire property.

Practical Tip for Nuremberg and the Franconia Metropolitan Region

In the Nuremberg metropolitan region, achievable rents vary considerably depending on location. While net base rents of 12 to 15 euros per square meter are common in central districts such as the Old Town or St. Johannis, rates in outlying areas or the surrounding region are significantly lower. Anyone wishing to determine the gross yield of a Nuremberg property should therefore consult the City of Nuremberg’s official rent index.

We recommend that owners of investment properties in Franconia regularly review the gross yield. Often, the actual rent for long-term tenants is significantly below the current market rent-which depresses the gross yield and thus the property’s capital value. When selling, the potential for rent adjustments can be used as an argument for the achievable purchase price, but it must be substantiated with factual evidence. We are happy to assist you with the rental market analysis and the determination of your property’s sustainable gross yield.

Frequently Asked Questions

What is the difference between gross yield and net yield?

Gross income comprises the total annual rental income of a property (net rent excluding utilities). Net income is calculated by deducting operating costs from gross income-that is, administrative costs, maintenance reserves, and the risk of rent loss. Net income is the figure used in the income approach for the actual valuation calculation.

Is the actual rent or the market rent used for gross income?

That depends on the purpose of the valuation. For the standardized income approach according to ImmoWertV, the sustainable market rent is used, not the current contractual rent. In practice, appraisers examine both values and justify their choice. Significant discrepancies between the actual rent and the market rent can have a noticeable impact on the determined income value.

Which revenues are not included in the gross income?

Recoupable operating costs (heating, water, garbage collection) are not included in the gross income, as these are passed on to tenants. Likewise, one-time revenues such as key money, tenant subsidies for fixtures, or proceeds from the sale of inventory are not taken into account. Gross income reflects only the rental income that can be generated regularly and sustainably.

How does gross income change in the event of vacancy?

Vacancies directly reduce gross income by the amount of lost rental income. In the income approach, the vacancy risk is accounted for through the risk of rent loss, which is deducted as a percentage of gross income-typically 2-4% for normal residential areas, and higher in cases of structural vacancy risk. A persistently high vacancy rate that exceeds the risk of rent loss is a warning sign and significantly depresses the income value. When purchasing investment properties, we recommend reviewing the vacancy history and acquiring only properties that are structurally easy to rent out.

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